There is a new pull request by thyssentishman against master on the mblaze repository

https://github.com/thyssentishman/mblaze master
https://github.com/leahneukirchen/mblaze/pull/242

Quote command expansion to prevent word splitting
This is necessary to support maildir paths that contain spaces.

This commit fixes #241 

A patch file from https://github.com/leahneukirchen/mblaze/pull/242.patch is attached